Tufa towers are unique geological formations made primarily of calcium carbonate. They typically form in freshwater environments, where mineral-rich water flows into lakes or ponds, leading to the precipitation of calcium carbonate. Over time, this process creates tall, spire-like structures that can reach impressive heights. These formations are often found in areas with high mineral content, such as near hot springs or alkaline lakes. One notable location for tufa towers is Mono Lake in California, where visitors can see these striking natural sculptures rising from the water's edge.